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15 July 2012 - Animals - Javed Shaik - 7 Comments

The parasite responsible for Malaria – Plasmodium

Members of the genus Plasmodium are collectively known as malarial parasites. They cause a febrile disease called malaria. Malaria as achill and fever disease is known to mankind for a long time. Eradication of malaria is an important problem in public health. For a long time it was believed that malaria was caused by harmful vapours produced in marshy land (Gr. Malo-bad+air).

PlasmodiumCharles Laveran, a french military surgeon, for the first time, noticed Plasmodium in the blood of a malarial patient, in 1880. Its connection with the intermediate host and the modes of transmission were experimentally worked out in Calcutta by Sir Ronald Ross in 1889. For this discovery he was awarded the nobel prize for medicine in 1902. Grassi (1890) provided absolute scientific proof for the specific relationship between Anopheles mosquito and the human malarial parasite.

The plasmodium

It is an intracellular sporozoan blood parasite. For the completion of life cycle it requires two hosts, a vertebrate and a blood sucking invertebrate. Transference of the parasite is effected by the invertebrate host. In man, the infection takes place by the inoculation of the slender, sickle shaped nucleated sporozoite in the blood by the bite of an infected female mosquito belonging to the genus Anopheles.

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